Oil Consumption in the first 7500 miles

Discussion in 'SRT Hellcat TSB's' started by Knightmare, Aug 11, 2015.

  1. Knightmare

    Knightmare Rookie

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    I was about 3K miles in when I noticed the engine pitch being "different" during start up and shut down. I checked my oil and I was down a quart and a half. So I topped it off.

    At the dealer oil change I informed them about the oil consumption and asked them to check into it. Upon picking it up they told me that my Hellcat was once again down 1.5 quarts but that the Chrysler documentation informed them to not to worry about oil consumption until after 7500 miles.

    I asked them to sell me some oil so I could top it off periodically and they said bringing it in on it's scheduled oil change would should suffice.

    It is 7 quarts (6 qrts plus one for filter and such). Losing 1.5 qrts every 3000 miles I won't make it to 6000 miles without blowing the engine up......so I'm monitoring it myself because "don't worry about it" didn't fly with me.

    Any one else experience this level of oil consumption or heard about the "7500 mile" Chrysler rule?

    Craig
     
  2. B5 Blue

    B5 Blue Platinum Member

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    Craig,

    HC is 6 quarts. When was the first time you checked it? New they will use a quart in 400-700 miles. Mine has 1200 miles since I changed it at 1000 and was down 3/4 of a quart. That's 1500 per quart, well within range.
     
  3. jim

    jim Silver Member

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    Mine used a quart
    In the 1st 1000.
    1/2 quart second 1000 Miles
    Now like none.
     
  4. Greg

    Greg Senior Hellcat Member Hellcat Car Club HCC Charter Member

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    Mine about 1.5 quarts in first 1000, tapered off to almost nothing by 3500.
     
  5. DShatzer

    DShatzer Gold Member

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    You should ask the service department, and the forum here, what is the acceptable oil consumption of this engine. I have another non-FCA vehicle that is not considered to be consuming excessive oil until it is using a quart every 1,000 miles after break-in, which is 10,000 miles.
     
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  6. Lighty

    Lighty Silver Member

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    Ditto
     
  7. cole3986

    cole3986 Gold Member

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    Mine oil level is a little down at 1,100 miles but hard to tell what the amount is, there are not dots or dipstick? Are you guys going by the amount of oil to fill it up to determine usage (i.e. not the dipstick). I am going to change the oil, so I guess I will not know what the consumption is.
     
  8. ramair111

    ramair111 Silver Member

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    If you are using that much oil you probably have some pistons that did not get the ring gaps staggered. I have had this happen on a new truck.
     
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  9. cole3986

    cole3986 Gold Member

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    B5,

    how many of those miles was the tach over 3,000? LOL.
     
  10. TallCool1

    TallCool1 Gold Member Hellcat Car Club Gold Supporting Member Nat'l Hellcat Tech Advisor HCC Charter Member

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    Knightmare it's 6 including filter and oil cooler, at a change.

    2500 miles only blowby loss which has been maybe 6...8 oz, lost in my catch can that's tossed.

    1st 1500 oe break in, maybe 100 miles of the remaining 1K might be considered "agressive" (where I'm really on the gas.)
     
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  11. B5 Blue

    B5 Blue Platinum Member

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    Ummm at least 1/2
     
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  12. Lucky Campbell

    Lucky Campbell Rookie

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    That sounds great for oil mileage. I once had a 1968 Coronet R/T Hemi 4speed, new it drank 1 qt of oil every 150 miles, never got much better than that, seemed to always smoke. so be happy. my current car 2006 300C srt8 now has 238,000 miles on it an drinks a quart about every 2500 miles.
     
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  13. BAPTRICIAN NASTY707

    BAPTRICIAN NASTY707 Rookie

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    Talked to two service departments both said 1 quart per 1800 miles is expected. FOREVER?
     
  14. TallCool1

    TallCool1 Gold Member Hellcat Car Club Gold Supporting Member Nat'l Hellcat Tech Advisor HCC Charter Member

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    Appears normal (see attached 1st, but this is how it would be handled by service if you complained about it.) Note 7500 miles below.

    09 - Engine, 6.2L/Diagnosis and Testing
    OIL CONSUMPTION TEST AND DIAGNOSIS
    The following diagnostic procedures are used to determine the source of excessive internal oil consumption, these procedures and tests apply to vehicles with 50,000 miles or less.



    NOTE:
    Engine oil consumption may be greater than normal during engine break-in. Repairs should be delayed until vehicle has been driven at least 7,500 miles.


    Severe service (high ambient temperature, short trips, heavy loading, trailer towing, taxi, off-road, or law enforcement use) may result in greater oil consumption than normal.


    Sustained high speed driving and high engine RPM operation may result in increased oil consumption.

    Failure to comply with the recommended oil type and viscosity rating, as outlined in the owner’s manual, may impact oil economy as well as fuel economy.

    Oil consumption may increase with vehicle age and mileage due to normal engine wear.


    NOTE:
    Because a few drops of external oil leakage per mile can quickly account for the loss of one quart of oil in a few hundred miles, verify that no external engine oil leaks are present.


    • Oil leakage is not the same as oil consumption and all external leakage must be eliminated before any action can be taken to verify and correct oil consumption complaints.
    • Verify that the engine has the correct oil level dipstick and dipstick tube installed.
    • Verify that the engine is not being run in an overfilled condition. Check the oil level 15 minutes after a hot shutdown with the vehicle parked on a level surface. In no case should the level be above MAX or the FULL mark on the dipstick.

    [paste:font size="4"]OIL CONSUMPTION TEST
    [/paste:font]



      • Check the oil level at least 15 minutes after a hot shutdown.
      • If the oil level is low, top off with the proper viscosity and API service level engine oil. Add one bottle of MOPAR® 4-In-1 Leak Detection Dye into the engine oil.
      • Tamper proof the oil pan drain plug, oil filter, dipstick and oil fill cap.
      • Record the vehicle mileage.
      • Instruct the customer to drive the vehicle as usual.
      • Ask the customer to return to the servicing dealer after accumulating 500 miles, Check the oil level at least 15 minutes after a hot shutdown. If the oil level is half way between the “FULL” and “ADD” mark continue with the next step.
      • Using a black light, re-check for any external engine oil leaks, repair as necessary, if no external engine oil leaks are present, continue with oil consumption diagnosis.
    OIL CONSUMPTION DIAGNOSIS

    1. Check the Positive Crankcase Ventilation (PCV) system. Make sure the system is not restricted and the PCV valve has the correct part number and correct vacuum source (18-20 in. Hg at idle below 3000 ft. above sea level is considered normal).


      • Perform a cylinder compression test and cylinder leak down test using the standard leak down gauge following manufacturers suggested best practices.

        NOTE:
        Verify the spark plugs are not oil saturated. If the spark plugs are oil saturated and compression is good it can be assumed the valve seals or valve guides are at fault.


      • If one or more cylinders have more than 15% leak down further engine tear down and inspection will be required.


    [paste:font size="4"]TOP 18 REASONS THAT MAY LEAD TO ENGINE OIL CONSUMPTION
    [/paste:font]



      • Tapered and Out-of-Round Cylinders The increased piston clearances permit the pistons to rock in the worn cylinders. While tilted momentarily, an abnormally large volume of oil is permitted to enter on one side of the piston. The rings, also tilted in the cylinder, permit oil to enter on one side. Upon reversal of the piston on each stroke, some of this oil is passed into the combustion chamber.
      • Distorted Cylinders This may be caused by unequal heat distribution or unequal tightening of cylinder head bolts. This condition presents a surface which the rings may not be able to follow completely. In this case, there may be areas where the rings will not remove all of the excess oil. When combustion takes place, this oil will be burned and cause high oil consumption.
      • Improper operation of the PCV system The main purpose of the Positive Crankcase Ventilation (PCV) valve is to recirculate blow-by gases back from the crankcase area through the engine to consume unburned hydrocarbons. The PCV system usually has a one way check valve and a make up air source. The system uses rubber hoses that route crankcase blow by gases to the intake manifold. Vacuum within the engine intake manifold pulls the blow by gases out of the crankcase into the combustion chamber along with the regular intake air and fuel mixture. The PCV system can become clogged with sludge and varnish deposits and trap blow by gases in the crankcase. This degrades the oil, promoting additional formation of deposit material. If left uncorrected, the result is plugged oil rings, oil consumption, rapid ring wear due to sludge buildup, ruptured gaskets and seals due to crankcase pressurization.
      • Worn Piston Ring Grooves For piston rings to form a good seal, the sides of the ring grooves must be true and flat – not flared or shouldered. Piston rings in tapered or irregular grooves will not seal properly and, consequently, oil will pass around behind the rings into the combustion chamber.
      • Worn, Broken or Stuck Piston Rings When piston rings are broken, worn or stuck to such an extent that the correct tension and clearances are not maintained, this will allow oil to be drawn into the combustion chamber on the intake stroke and hot gases of combustion to be blown down the cylinder past the piston on the power stroke. All of these conditions will result in burning and carbon build up of the oil on the cylinders, pistons and rings.
      • Cracked or Broken Ring Lands Cracked or broken ring lands prevent the rings from seating completely on their sides and cause oil pumping. This condition will lead to serious damage to the cylinders as well as complete destruction of the pistons and rings. Cracked or broken ring lands cannot be corrected by any means other than piston replacement.
      • Worn Valve Stems and Guides When wear has taken place on valve stems and valve guides, the vacuum in the intake manifold will draw oil and oil vapor between the intake valve stems and guides into the intake manifold and then into the cylinder where it will be burned.
      • Bent or Misaligned Connecting Rods Bent or misaligned connecting rods will not allow the pistons to ride straight in the cylinders. This will prevent the pistons and rings from forming a proper seal with the cylinder walls and promote oil consumption. In addition, it is possible that a bearing in a bent connect rod will not have uniform clearance on the connecting rod wrist pin. Under these conditions, the bearing will wear rapidly and throw off an excessive amount of oil into the cylinder.
      • Fuel Dilution If raw fuel is allowed to enter the lubrication system, the oil will become thinner and more volatile and will result in higher oil consumption. The following conditions will lead to higher oil consumption;
        • Excess fuel can enter and mix with the oil via a leaking fuel injector
        • Gasoline contaminated with diesel fuel
        • Restricted air intake
        • Excessive idling
      • Contaminated Cooling Systems Corrosion, rust, scale, sediment or other formations in the water jacket and radiator will prevent a cooling system from extracting heat efficiently. This is likely to cause cylinder distortion thus leading to higher oil consumption.
      • Oil Viscosity The use of oil with a viscosity that is too light may result in high oil consumption. Refer to the vehicle owner’s manual for the proper oil viscosity to be used under specific driving conditions and ambient temperatures.
      • Dirty Engine Oil Failure to change the oil and filter at proper intervals may cause the oil to be so dirty that it will promote accumulation of sludge and varnish and restrict oil passages in the piston rings and pistons. This will increase oil consumption; dirty oil by nature is also consumed at a higher rate than clean oil.
      • Crankcase Overfull Due to an error in inserting the oil dip stick so that it does not come to a seat on its shoulder, a low reading may be obtained. Additional oil may be added to make the reading appear normal with the stick in this incorrect position which will actually make the oil level too high. If the oil level is so high that the lower ends of the connecting rods touch the oil in the oil pan excessive quantities of oil will be thrown on the cylinder walls and some of it will work its way up into the combustion chamber.
      • Excessively High Oil Pressure A faulty oil pressure relief valve may cause the oil pressure to be too high. The result will be that the engine will be flooded with an abnormally large amount of oil in a manner similar to that which occurs with worn bearings. This condition may also cause the oil filter to burst.
      • Aftermarket Performance Chips and Modification Increasing performance through the use of performance/power enhancement products to a stock or factory engine will increase the chance of excessive oil consumption.
      • Lugging Engine Lugging is running the engine at a lower RPM in a condition where a higher RPM (more power/torque) should be implemented. Especially susceptible on vehicles equipped with a manual transmission. This driving habit causes more stress loading on the piston and can lead to increases in engine oil consumption.
      • Turbocharged Engines There is a possibility for PCV “push-over” due to higher crankcase pressure (as compared to naturally aspirated engines) which is normal for turbocharged engines. This condition causes varying amounts of engine oil to enter the intake manifold, charge air cooler and associated plumbing to and from the charge air cooler, also a leaking turbocharger seal will draw oil into the combustion chamber where it will burn (blue smoke from the tail pipe may be present) and form carbon deposits which contribute to further oil consumption as they interfere with proper engine function.
      • Restricted Air Intake Excessive restriction in the air intake system will increase engine vacuum and can increase oil consumption. An extremely dirty air filter would be one example of this situation.
     

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    Last edited: Aug 22, 2015
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  15. Deputydog

    Deputydog Gold Member

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    Good article!

    I'm at 4500 miles and no consumption at all..
     
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